<template>
  <div>
        <!-- 面包屑导航 -->
      <el-breadcrumb separator="/">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>商品管理</el-breadcrumb-item>
      <el-breadcrumb-item>添加商品</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
<!-- 提示区域   -->
  <el-alert title="添加商品信息" type="info" center show-icon :closable="false">
  </el-alert>
  <!-- 步骤条 -->
<el-steps :space="200" :active="activeIndex - 0" finish-status="success" align-center>
  <el-step title="基本信息"></el-step>
  <el-step title="商品参数"></el-step>
  <el-step title="商品属性"></el-step>
  <el-step title="商品图片"></el-step>
  <el-step title="商品内容"></el-step>
  <el-step title="完成"></el-step>
</el-steps>
<!-- tab栏区域 -->
  <el-form :model="addForm" :rules="addFormRules" ref="addFormRef" label-width="100px" label-position="top">
  <el-tabs v-model="activeIndex" :tab-position="'left'" :before-leave="beforeTabLeave" @tab-click="tabClicked">
    <el-tab-pane label="基本信息" name="0">
      <el-form-item label="商品名称" prop="goods_name">
        <el-input v-model="addForm.goods_name"></el-input>
      </el-form-item>
      <el-form-item label="商品价格" prop="goods_price">
        <el-input v-model="addForm.goods_price" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品重量" prop="goods_weight">
        <el-input v-model="addForm.goods_weight" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品数量" prop="goods_number">
        <el-input v-model="addForm.goods_number" type="number"></el-input>
      </el-form-item>
      <el-form-item label="商品分类" prop="goods_cat">
        <el-cascader expand-trigger="hover" :options="catelist"
         v-model="addForm.goods_cat" @change="handleChange" :props="cateProps">

        </el-cascader>
      </el-form-item>

    </el-tab-pane>
    <el-tab-pane label="商品参数" name="1"> 
      <!-- 渲染表单的Item项 -->
      <el-form-item :label="item.attr_name" v-for="item in manyTableData" :key="item.attr_id">
        <!-- 复选框组 -->
  <el-checkbox-group v-model="item.attr_vals">
    <el-checkbox :label="cb" v-for="(cb, i) in item.attr_vals" :key="i" border></el-checkbox>
  </el-checkbox-group>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品属性" name="2">
      <el-form-item :label="item.attr_name" v-for="item in onlyTableData" :key="item.attr_id">
        <el-input v-model="item.attr_vals"></el-input>
      </el-form-item>
    </el-tab-pane>
    <el-tab-pane label="商品图片" name="3">
      <!-- action表示图片要上传到的后台API地址 -->
      <el-upload
  :action="uploadURL"
  :on-preview="handlePreview"
  :on-remove="handleRemove"
  :headers="headerObj"
  :on-success="handleSuccess"
  list-type="picture">
  <el-button size="small" type="primary">点击上传</el-button>
</el-upload>
    </el-tab-pane>
    <el-tab-pane label="商品内容" name="4">
      <!-- 富文本编辑器组件 -->
      <quill-editor v-model="addForm.goods_introduce"></quill-editor>
      <el-button type="primary" class="btnAdd" @click="add">添加商品</el-button>
    </el-tab-pane>
  </el-tabs>
  </el-form>
  </el-card>
  <el-dialog
  title="提示"
  :visible.sync="preViewDialogVisible"
  width="50%">
  <img :src="previewPath" class="previewImg">
</el-dialog>
  </div>
</template>

<script>
import _ from 'lodash'
export default {
    data () {
        return {
            activeIndex: '0',
            // 添加商品的表单数据对象
            addForm: {
              goods_name: '',
              goods_price: 0,
              goods_weight: 0,
              goods_number: 0,
              // 商品所属的分类数组
              goods_cat: [],
              // 图片的数组
              pics: [],
              // 商品的详情描述
              goods_introduce: '',
              attrs: []
            },
            // 添加的验证规则
            addFormRules: {
              goods_name: [
                {
                  required: true,
                  message: '请输入商品名称',
                  trigger: 'blur'
                }
              ],
              goods_price: [
                {
                  required: true,
                  message: '请输入商品价格',
                  trigger: 'blur'
                }
              ],
              goods_weight: [
                {
                  required: true,
                  message: '请输入商品重量',
                  trigger: 'blur'
                }
              ],
              goods_number: [
                {
                  required: true,
                  message: '请输入商品数量',
                  trigger: 'blur'
                }
              ],
              goods_weight: [
                {
                  required: true,
                  message: '请输入商品重量',
                  trigger: 'blur'
                }
              ],
              goods_cat: [
                {
                  required: true,
                  message: '请选择商品分类',
                  trigger: 'blur'                  
                }
              ]
            },
            // 商品分类列表
            catelist: [],
            cateProps: {
              label: 'cat_name',
              value: 'cat_id',
              children: 'children'
            },
            // 动态参数列表数组
            manyTableData: [],
            // 静态属性列表数组
            onlyTableData: [],
            // 上传图片的URL地址
            uploadURL: 'http://127.0.0.1:8888/api/private/v1/upload',
            // 图片上传组件的 headerObj 请求头对象
            headerObj: {
              Authorization: window.sessionStorage.getItem('token')
            },
            // 预览地址
            previewPath: '',
            preViewDialogVisible: false
        }
    },
    created() {
      this.getCateList()
    },
    methods: {
      // 获取所有商品分类数据
      async getCateList() {
        const { data: res } = await this.$http.get('categories')
        if (res.meta.status !== 200) {
          return this.$message.error('获取商品分类数据失败！')
        }
        this.catelist = res.data
        // console.log(this.catelist)
      },
      // 级联选择器选中项变化，会触发这个函数
      handleChange() {
        // console.log(this.addForm.goods_cat)
        if (this.addForm.goods_cat.length !== 3){
          this.addForm.goods_cat = []
        }
      },
      beforeTabLeave(activeName, oldActiveName) {
        // console.log('即将离开的标签页名字是:' + oldActiveName)
        // console.log('即将进入的标签页名字是:' + activeName)
        // return false
        if (oldActiveName === '0' && this.addForm.goods_cat.length !== 3)
        {
          this.$message.error('请选择商品分类！')
          return false
        }
      },
      async tabClicked() {
        // console.log(this.activeIndex)
        // 证明访问的是动态参数面板
        if (this.activeIndex === '1') {
          // console.log('动态参数面板')
          const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,{params: { sel: 'many' }})
          if (res.meta.status !== 200) {
            return this.$message.error('获取动态参数列表失败！')
          }
          console.log(res.data)
          res.data.forEach(item => {
            item.attr_vals = item.attr_vals.length === 0 ? [] : item.attr_vals.split(' ')
          });
          this.manyTableData = res.data
        }else if(this.activeIndex === '2') {
         const { data: res } = await this.$http.get(`categories/${this.cateId}/attributes`,{ params: { sel: 'only' } })
          if (res.meta.status !== 200) {
            return this.$message.error('获取静态属性失败！')
          }
          console.log(res.data)
          this.onlyTableData = res.data
        }
      },
      // 处理图片预览效果
      handlePreview(file) {
        // console.log(file)
        this.previewPath = file.response.data.url
        this.preViewDialogVisible = true
      },
      // 处理一处图片的操作
      handleRemove(file) {
        // console.log(file)
        // 1.获取将要删除的图片的临时路径
        const filePath = file.response.data.tmp_path
        // 2.从pics数组中，找到这个图片对应的索引值
        const i = this.addForm.pics.findIndex(x => 
        x.pic === filePath)
        // 3.调用数组的splice方法，吧图片信息对象，从pics数组中移除
        this.addForm.pics.splice(i, 1)
        console.log(this.addForm)
      },
      // 监听图片上传成功的事件
      handleSuccess(response) {
        console.log(response)
        // 1.拼接得到一个图片信息对象
        const picInfo = { pic: response.data.tmp_path }
        // 2.将图片信息对象，  push 到 pics数组中
        this.addForm.pics.push(picInfo)
        console.log(this.addForm)
      },
      // 添加商品
      add() {
        // console.log(this.addForm)
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) {
            return this.$message.error('请填写必要的表单项！')
          }
          // 执行添加的业务逻辑
          // loadsh cloneDeep(obj)
          // 深层拷贝
          const form = _.cloneDeep(this.addForm)
          form.goods_cat = form.goods_cat.join(',')
          // 处理动态参数
          this.manyTableData.forEach(item => {
            const newInfo = { 
              attr_id: item.attr_id,
              attr_vals: item.attr_vals.join(' ')
              }
            this.addForm.attrs.push(newInfo)
          })
          // 处理静态属性
          this.onlyTableData.forEach(item => {
            const newInfo = {
              attr_id: item.attr_id,
              attr_vals: item.attr_vals
            }
            this.addForm.attrs.push(newInfo)
          })
          form.attrs = this.addForm.attrs
          // console.log(form)


          // 发起请求添加商品
          // 商品的名称，必须是唯一的
          const { data: res } = await this.$http.post('goods', form)
          if (res.meta.status !== 201)
          {
            return this.$message.error('添加商品失败！')
          }
          this.$message.success('添加商品成功！')
          this.$router.push('/goods')
        })
      }
    },
    computed: {
      cateId() {
        if (this.addForm.goods_cat.length === 3) {
          return this.addForm.goods_cat[2]
        }
        return null
      }
    }
}
</script>

<style lang="less" scoped>
.el-checkbox {
  margin: 0 5px 0 0 !important;
}
.previewImg {
  width: 100%;
}
.btnAdd {
  margin-top: 15px;
}
</style>